/* ============================================================
   Reset & Base
============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans JP', sans-serif;
  color: #2B2B2B;
  background: #FDF6E3;
  line-height: 1.75;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; }

/* ============================================================
   Variables
============================================================ */
:root {
  --cream:      #FDF6E3;
  --cream-dark: #F0E6C8;
  --blue-light: #D8EDF8;
  --blue-mid:   #5B8DB8;
  --blue-dark:  #2C4B6E;
  --red:        #D94040;
  --orange:     #C8560A;
  --yellow:     #F5C518;
  --text:       #2B2B2B;
  --text-mid:   #666666;
  --line-green: #06C755;
  --line-dark:  #05A847;
  --radius:     16px;
  --shadow:     0 4px 16px rgba(0,0,0,0.10);
}

/* ============================================================
   Layout
============================================================ */
.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 64px 0; }
.section--blue { background: var(--blue-light); }
.section--dark { background: var(--blue-dark); color: #fff; }

/* ============================================================
   Section Headers
============================================================ */
.section__title {
  font-family: 'Noto Serif JP', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--orange);
  text-align: center;
  margin-bottom: 12px;
}
.section__title::after {
  content: '';
  display: block;
  width: 36px;
  height: 3px;
  background: var(--yellow);
  border-radius: 2px;
  margin: 10px auto 0;
}
.section__title--light { color: #fff; }
.section__lead {
  text-align: center;
  color: var(--text-mid);
  font-size: 14px;
  line-height: 1.9;
  margin-bottom: 36px;
}

/* ============================================================
   Buttons
============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 9999px;
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn:hover  { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.btn:active { transform: translateY(0); }
.btn--line  { background: var(--line-green); color: #fff; }
.btn--line:hover { background: var(--line-dark); }
.btn--lg {
  font-size: 17px;
  padding: 17px 0;
  width: 100%;
  max-width: 300px;
}
.btn__icon { width: 20px; height: 20px; }

/* CTA block (centered wrapper) */
.cta-block { text-align: center; margin-top: 40px; }
.cta-block__note {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-mid);
}

/* ============================================================
   Deco (shared positioned elements)
============================================================ */
.deco {
  position: absolute;
  pointer-events: none;
  z-index: 1;
}
.deco--moon        { top: 20px; right: 20px; width: 60px; }
.deco--light-left  { bottom: 56px; left: 0;   width: 44px; }
.deco--light-right { bottom: 56px; right: 0;  width: 38px; }
.deco--tree        { bottom: 0; left: 0; width: 100%; opacity: .85; }

/* ============================================================
   Hero
============================================================ */
/* ---- Hero: モバイル – 画像→コンテンツの完全積み上げ ---- */
.hero {
  display: block;
  background: var(--blue-dark);
  text-align: center;
}
.hero__bg {
  display: block;
  width: 100%;
  line-height: 0;
}
.hero__bg img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: unset;
}
.hero__bg picture {
  display: block;
}
.hero__bg::after {
  display: none;
}
.hero__content {
  width: 100%;
  background: var(--blue-dark);
  padding: 28px 20px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero__catch {
  font-family: 'Klee One', 'Noto Serif JP', serif;
  font-size: 28px;
  font-weight: 600;
  color: #fff;
  letter-spacing: .06em;
  margin-bottom: 12px;
  line-height: 1.4;
}
.hero__lead {
  font-size: 13px;
  color: rgba(255,255,255,.88);
  line-height: 1.8;
  margin-bottom: 8px;
}
.hero__tagline {
  font-size: 18px;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 20px;
  letter-spacing: .04em;
}
.hero__meta { margin-bottom: 20px; }
.hero__date {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.hero__scale {
  display: inline-block;
  font-size: 13px;
  color: #fff;
  line-height: 1.7;
  background: rgba(255,255,255,.15);
  border-radius: 12px;
  padding: 8px 16px;
}
.hero__open {
  display: block;
  background: var(--yellow);
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: 20px;
  margin: 0 auto 12px;
  width: fit-content;
}
.hero__note {
  margin-top: 10px;
  font-size: 12px;
  color: rgba(255,255,255,.85);
}
.btn--instagram {
  background: linear-gradient(135deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
  color: #fff;
  margin-bottom: 16px;
}
.btn--instagram:hover {
  background: linear-gradient(135deg, #d4832b 0%, #c85a33 25%, #c02038 50%, #b01d58 75%, #a01474 100%);
}
.hero__time {
  font-size: 22px;
  font-weight: 700;
  color: var(--yellow);
  margin-top: 6px;
  letter-spacing: .05em;
}

/* ============================================================
   About
============================================================ */
.about__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 36px;
}
.about__card {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px 10px;
  text-align: center;
  box-shadow: var(--shadow);
}
.about__card-category {
  font-size: 11px;
  font-weight: 700;
  color: var(--blue-mid);
  letter-spacing: .08em;
  margin-bottom: 8px;
  text-transform: none;
}
.about__card-icon  { font-size: 26px; margin-bottom: 6px; }
.about__card-num   {
  font-family: 'Noto Serif JP', serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--red);
  line-height: 1;
  margin-bottom: 4px;
}
.about__card-num span { font-size: 13px; font-weight: 400; }
.about__card-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--orange);
  margin-bottom: 4px;
}
.about__card-desc { font-size: 11px; color: var(--text-mid); line-height: 1.5; }
.about__illust { max-width: 260px; margin: 0 auto; }

/* ============================================================
   Schedule
============================================================ */
.schedule__list {
  display: flex;
  flex-direction: column;
  margin-bottom: 36px;
}
.schedule__step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: #fff;
  border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: var(--shadow);
}
.schedule__step--shuffle {
  background: #FFF8EE;
  border: 2px dashed var(--orange);
  box-shadow: none;
}
.schedule__step--final {
  background: linear-gradient(135deg, #FFF9DC, #FFE97A);
  border: 2px solid var(--yellow);
  box-shadow: none;
}
.schedule__badge {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  background: var(--blue-mid);
  border-radius: 9999px;
  padding: 3px 10px;
  margin-top: 3px;
  white-space: nowrap;
}
.schedule__badge--shuffle { background: var(--orange); }
.schedule__badge--final   { background: var(--yellow); color: var(--text); }
.schedule__body h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-dark);
  margin-bottom: 4px;
  font-family: 'Noto Sans JP', sans-serif;
}
.schedule__body p  { font-size: 13px; color: var(--text-mid); }
.schedule__time {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-mid);
  background: var(--blue-light);
  padding: 1px 8px;
  border-radius: 9999px;
  margin-left: 4px;
}
.schedule__arrow {
  text-align: center;
  color: var(--blue-mid);
  font-size: 18px;
  padding: 4px 0;
}
.schedule__illust { max-width: 220px; margin: 0 auto; }

/* ============================================================
   Target
============================================================ */
.target__list {
  list-style: none;
  margin-bottom: 20px;
}
.target__list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 13px 0;
  border-bottom: 1px solid var(--cream-dark);
  font-size: 15px;
}
.target__list li:last-child { border-bottom: none; }
.target__note {
  background: var(--cream-dark);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 28px;
}
.target__note p { font-size: 13px; color: var(--text-mid); }
.target__illust { max-width: 220px; margin: 0 auto; }

/* ============================================================
   Details
============================================================ */
.details__list { margin-bottom: 32px; }
.details__row {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.details__row:last-child { border-bottom: none; }
.details__row dt {
  font-weight: 700;
  font-size: 13px;
  color: var(--yellow);
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 80px;
  padding-top: 2px;
}
.details__row dd {
  font-size: 14px;
  line-height: 1.8;
  color: #fff;
}
.details__row dd strong { color: var(--yellow); font-size: 17px; }
.details__row dd small  { display: block; font-size: 11px; color: rgba(255,255,255,.55); }
.details__illust { max-width: 180px; margin: 0 auto; opacity: .85; }

/* ============================================================
   Safety
============================================================ */
.safety__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.safety__item {
  background: #fff;
  border-radius: var(--radius);
  padding: 22px 14px;
  text-align: center;
  box-shadow: var(--shadow);
}
.safety__icon { font-size: 30px; margin-bottom: 10px; }
.safety__item h3 {
  font-size: 13px;
  font-weight: 700;
  color: var(--blue-dark);
  margin-bottom: 8px;
  font-family: 'Noto Sans JP', sans-serif;
}
.safety__item p { font-size: 12px; color: var(--text-mid); line-height: 1.7; }

/* ============================================================
   How To
============================================================ */
.howto__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  margin-bottom: 40px;
}
.howto__list::before {
  content: '';
  position: absolute;
  left: 21px;
  top: 44px;
  bottom: 44px;
  width: 2px;
  background: linear-gradient(to bottom, var(--blue-mid), var(--yellow));
  z-index: 0;
}
.howto__step {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 12px 0;
  position: relative;
  z-index: 1;
}
.howto__num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--blue-mid);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow);
}
.howto__num--last  { background: var(--line-green); font-size: 20px; }
.howto__body {
  flex: 1;
  background: #fff;
  border-radius: var(--radius);
  padding: 14px 18px;
  box-shadow: var(--shadow);
  margin-top: 2px;
}
.howto__body h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-dark);
  margin-bottom: 4px;
  font-family: 'Noto Sans JP', sans-serif;
}
.howto__body p { font-size: 13px; color: var(--text-mid); }

/* ============================================================
   FAQ
============================================================ */
.faq__list { display: flex; flex-direction: column; gap: 10px; }
.faq__item {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.faq__item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  color: var(--blue-dark);
  list-style: none;
  position: relative;
  transition: background .2s;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::before {
  content: 'Q';
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--orange);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.faq__item summary::after {
  content: '＋';
  position: absolute;
  right: 16px;
  color: var(--orange);
  font-size: 20px;
  line-height: 1;
  transition: transform .3s;
}
details[open] .faq__item summary,
.faq__item[open] summary { background: #FFF8F0; }
details[open] summary::after { transform: rotate(45deg); }
.faq__item p {
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.85;
  padding: 0 18px 18px 54px;
  border-top: 1px solid var(--cream-dark);
  padding-top: 14px;
}

/* ============================================================
   Closing
============================================================ */
.closing {
  position: relative;
  padding: 80px 20px 60px;
  overflow: hidden;
  text-align: center;
}
.closing__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.closing__bg img { width: 100%; height: 100%; object-fit: cover; }
.closing__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.60);
}
.closing__content {
  position: relative;
  z-index: 2;
  max-width: 480px;
  margin: 0 auto;
}
.closing__logo { width: 200px; margin: 0 auto 12px; }
.closing__catch {
  font-family: 'Noto Serif JP', serif;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .06em;
  margin-bottom: 10px;
  text-shadow: 0 2px 12px rgba(0,0,0,.6);
}
.closing__date {
  font-size: 18px;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 4px;
  text-shadow: 0 1px 8px rgba(0,0,0,.5);
}
.closing__sub {
  display: inline-block;
  font-size: 13px;
  color: #fff;
  background: rgba(255,255,255,.18);
  border-radius: 9999px;
  padding: 4px 16px;
  margin-bottom: 28px;
}
.closing__capacity {
  margin-top: 10px;
  font-size: 12px;
  color: rgba(255,255,255,.8);
  line-height: 1.9;
}
.closing__illust { max-width: 220px; margin: 32px auto 0; }

/* ============================================================
   Venues
============================================================ */
.venues__rounds {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.venues__round {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.venues__round-badge {
  font-weight: 700;
  font-size: 13px;
  padding: 4px 16px;
  border-radius: 20px;
  color: #fff;
}
.venues__round-badge--1 { background: var(--orange); }
.venues__round-badge--2 { background: var(--blue-dark); }
.venues__round-badge--3 { background: #9b59b6; }
.venues__round-food { font-size: 13px; color: var(--text-mid); }
.venues__round-arrow { font-size: 20px; color: var(--cream-dark); margin-top: -12px; }
.venues__note {
  font-size: 12px;
  color: var(--text-mid);
  text-align: center;
  margin-bottom: 28px;
  line-height: 1.8;
}
.venues__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 8px;
}
.venues__card {
  background: #fff;
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  display: block;
  transition: transform .15s, box-shadow .15s;
}
a.venues__card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,.13);
}
.venues__card--tba {
  background: var(--cream-dark);
  border: 2px dashed var(--cream-dark);
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.venues__card--tba .venues__card-name { color: var(--text-mid); font-size: 13px; }
.venues__card-name { font-weight: 700; font-size: 14px; margin-bottom: 4px; line-height: 1.4; }
.venues__card-link { font-size: 11px; color: var(--blue-mid); }
.venues__coming {
  grid-column: 1 / -1;
  background: var(--cream-dark);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  font-size: 14px;
  color: var(--text-mid);
}

/* ============================================================
   Sponsors
============================================================ */
.sponsors__tiers { margin-bottom: 28px; }
.sponsors__tier { margin-bottom: 24px; }
.sponsors__tier-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-mid);
  text-align: center;
  margin-bottom: 12px;
}
.sponsors__logos {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.sponsors__logo {
  background: #fff;
  border: 1px solid var(--cream-dark);
  border-radius: 8px;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  min-width: 120px;
  text-align: center;
}
.sponsors__coming {
  background: var(--cream-dark);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 24px;
}
.sponsors__cta { text-align: center; }
.sponsors__cta-text { font-size: 13px; color: var(--text-mid); margin-bottom: 12px; }
.btn--outline {
  display: inline-block;
  border: 2px solid var(--blue-dark);
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: 40px;
  transition: background .2s, color .2s;
}
.btn--outline:hover { background: var(--blue-dark); color: #fff; }

/* ============================================================
   Footer
============================================================ */
.footer {
  background: var(--blue-dark);
  color: rgba(255,255,255,.65);
  padding: 40px 20px;
  text-align: center;
}
.footer__org     { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.footer__org--support { font-size: 12px; font-weight: 400; color: rgba(255,255,255,.75); margin-bottom: 12px; }
.footer__contact { font-size: 13px; margin-bottom: 16px; }
.footer__contact a { color: rgba(255,255,255,.75); text-decoration: underline; }
.footer__links {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.footer__links a    { font-size: 12px; color: rgba(255,255,255,.65); transition: color .2s; }
.footer__links a:hover { color: #fff; }
.footer__links span { color: rgba(255,255,255,.3); font-size: 12px; }
.footer__copy { font-size: 11px; }

/* ============================================================
   Sticky CTA
============================================================ */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 20px;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid rgba(0,0,0,.08);
  display: flex;
  justify-content: center;
  z-index: 100;
  transform: translateY(100%);
  transition: transform .35s ease;
}
.sticky-cta.is-visible { transform: translateY(0); }
.sticky-cta .btn {
  font-size: 16px;
  padding: 14px 0;
  width: 100%;
  max-width: 300px;
}

/* ============================================================
   Responsive — Tablet (768px+)
============================================================ */
@media (min-width: 768px) {
  .section { padding: 80px 0; }
  .section__title { font-size: 26px; }
  .section__lead  { font-size: 15px; }

  /* Hero: デスクトップ – 全画面オーバーレイ */
  .hero {
    display: flex;
    position: relative;
    min-height: 100svh;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    overflow: hidden;
    padding: 0 20px 60px;
    background: #000;
  }
  .hero__bg {
    position: absolute;
    inset: 0;
    width: 100%;
    line-height: 0;
  }
  .hero__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
  }
  .hero__bg::after {
    display: block;
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
      to bottom,
      transparent 55%,
      rgba(0,0,0,0.40) 78%,
      rgba(0,0,0,0.62) 100%
    );
  }
  .hero__content {
    position: relative;
    z-index: 2;
    background: transparent;
    padding: 0;
    max-width: 480px;
  }
  .hero__catch { font-size: 36px; }

  .about__card-num  { font-size: 34px; }
  .about__card-desc { font-size: 12px; }

  .safety__grid { grid-template-columns: repeat(4, 1fr); }

  .details__row dt { min-width: 96px; }
}

/* ============================================================
   Responsive — PC (1024px+)
============================================================ */
@media (min-width: 1024px) {
  .container { max-width: 900px; }

  .section { padding: 96px 0; }
  .section__title { font-size: 30px; }

  /* Hero */
  .hero__content  { max-width: 640px; }
  .hero__catch    { font-size: 42px; }
  .hero__date     { font-size: 24px; }
  .hero__scale    { font-size: 15px; }

  /* About — 3カラムはそのまま、カード内を大きく */
  .about__cards { gap: 24px; margin-bottom: 48px; }
  .about__card  { padding: 28px 16px; }
  .about__card-icon { font-size: 32px; }
  .about__card-num  { font-size: 40px; }
  .about__card-num span { font-size: 16px; }
  .about__card-label { font-size: 13px; }
  .about__card-desc  { font-size: 13px; }
  .about__illust { max-width: 340px; }

  /* Schedule — 常に1カラム */
  .schedule__list { max-width: 560px; margin: 0 auto; }
  .schedule__illust { max-width: 280px; }

  /* Target — 2カラム */
  .target__list li { font-size: 16px; }

  /* Details — 横幅を活かして見やすく */
  .details__row dt { min-width: 110px; font-size: 14px; }
  .details__row dd { font-size: 16px; }
  .details__row dd strong { font-size: 20px; }
  .details__illust { max-width: 220px; }

  /* Safety — 4カラムはそのまま、余白を増やす */
  .safety__grid { gap: 20px; }
  .safety__item { padding: 28px 18px; }
  .safety__icon { font-size: 36px; }
  .safety__item h3 { font-size: 15px; }
  .safety__item p  { font-size: 13px; }

  /* How To — 2カラム */
  .howto__list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 48px;
  }
  .howto__list::before { display: none; }
  .howto__step { padding: 16px 0; }
  .howto__body { padding: 16px 20px; }
  .howto__body h3 { font-size: 15px; }
  .howto__body p  { font-size: 14px; }

  /* FAQ — 最大幅を広げる */
  .faq__item summary { font-size: 15px; padding: 20px 20px; }
  .faq__item p { font-size: 14px; }

  /* Closing */
  .closing__catch { font-size: 30px; }
  .closing__date  { font-size: 22px; }
  .closing__logo  { width: 260px; }
  .closing__illust { max-width: 280px; }

  /* Sticky CTA — PCでは幅を制限 */
  .sticky-cta .btn { max-width: 360px; }
}